Answer:
No.
Explanation:
The average distance to the center is over 6300km.
Answer: -
8.00 g
The law of conservation of mass
Explanation: -
When magnesium burns in air it combines with oxygen to form magnesium oxide.
The mass of the product is the mass of the magnesium oxide.
The mass of the reactant is the mass of the magnesium + mass of the oxygen.
Since matter cannot be created or destroyed according to the law of conservation of mass,
Mass of Magnesium oxide formed = mass of magnesium reacted + mass of oxygen reacted
= 3.00 g + 5.00 g
= 8.00 g
Using formula:
-(1)
where w is weight of object,
m is mass of the object, and
g is the acceleration of gravity.
mass, m = 6 lbm (given)
acceleration of gravity, g = 
(given)
Now, substituting the values in equation (1):
Since, 
So, 
Hence, the mass of an object is 5.976 lbf.
We can get the Ka value from this formula:
Ka = [H+] [A-} / [HA]
So we need to know [H+] & [A-] & [Ha] to get the Ka value
[H+] = 2.9 * 0.52/100 =0.01508 M
and when [H+] = [A-]
∴[A-] = 0.01508 M
∴ [HA] = 2.9 - 0.01508 = 2.88 M
So by substitution:
Ka = [0.01508][0.01508] / 2.88
= 7.9 x 10^-5
